Never like Dr. Strange as an Avenger, call me old school but he was a Defender, much like Namor, he shouldn't have been an Avenger. As far as his ability, well, that seemed to be very much in flux during his time on the team and while I feel that what superhero group wouldn't be better with a Sorcerer Supreme among their ranks, it just never sat well with me. I can say that for a lot of the heroes added during the Bendas years. (Spiderman, Wolverine, Sentry, etc)